The Flanged Immersion Heater models listed on this page do not have thermostats, but are available with thermostats. A Thermowell is standard in the design to allow for a thermostat/temperature sensing device. To add a thermostat with a 60°-250° F range, replace: "X" in model number with a "2-". A Flanged Immersion Heater ordered with a thermostat will be supplied with a high profile terminal enclosure.